Nailing-strip.



S. M.- RANDOLPH. NAILING STRIP. APPLIUATION FILED DEO. 18', 1907.

1;@21847f Patented Apr. 2, 1912.

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Arromlfrs retiran salaries rarest* lorries.

STIXSFIH MARTN RANDOLPH, F OAK IFARK, ILLINOIS.

Martins-snare.

.application filed December 1S, 1907. Seria''o. 106,9?2.

To all whom it 'may concern:

Be it known that I, SMITH MARTIN AIRAN- noLrrr, a citizen vof the UnitedStates of America, and a resident of Oak Park, in the 5 county ofCool/rl and State of Illinois, have invented certain new and usefulImprovements in Failing-Strips, to loe placed in concrete, grout, orother plastic material which later sets and hardens, tor fasteningWooden it@ floors, carpets, rugs thereto, or in completing or nishingthe side Walls, roofs, orthe like,

of which the followingis a specification.

In the use ot' wooden strips for this purpose as is new common, the Woodreadily abl5 sorbs the moisture from the plastic material and swells, orexpands, the plastic material setting and hardening to the form anddimensionso the strips as thus enlarged. Af-

- ter the plastic material has setl and hardened 5l@ the moisture isgradually evaporated out .of the wood which then shrinks thus becomingloose in its bed or cavity. Such Work is unsatisfactory and variousmeans are emi ployed to seek to overcome the difficulty. Because of suchdifticulty it`A is customary to lay such strips in a` separate oradditional layer of plastic .material on the top of the floor proper,thus adding to the Weight of the floor, it being impossible to employsuch a method in the construction ot the door proper as thestrips-prevent the operation of the compression necessary to forni a rinand staple door.

The object of this invention is to over- S come the objections abovereferred to and to this end I employ suitable strips of non-ah sorptiveor Water-proof material capable of holding a nail or equivalent'memberand which shall he substantially vfire proof. In 40 carrying myinvention into operation, I also refer to make suehstrips of such aform' that they will be self anchoring in the material thus preventing,-accidental displacement or the strips becomlng loose With use as Well asinsuring suitable compression. It also economizes time in theconstruction of such work to a considerable extent as will appear inthedescription thereof.

-In the drawings wherein like reference characters indicate like orcorresponding parts; Figure 1 is a perspective View of a strip suitablefor a carpet fastening, showing at one end a sectional View to moreclearly illustratemy invention. Fig, 2'is a section of .lloor showingsuch strips in positionnd a carpet or rug securedA thereto.r

Specification of Letters Patent.

Patented Apr. E, i@if Fig. 3 is a partial sectional vieuT showing amodified torni of strip in position; and Fig. l is a section of a Hoorshowing several strips of the torni illustrated in Fig. 3 in poe0sit-ion. Fig. 5 is a detail perspective View of a pair of stripsshowingl the same nested together.

In the 'form shown in, Fig. l, A, B illustrate a nailing stripcomprising' a suitable c5 metal form or shell a into which is placed aporous or penetrable material f and with rivets l) placed at suitableintervals to bind the `parts together. The end indicated in a ispreferalily constructed with the shell eX- tended slightly so that theend ot' one strip may be positioned or nested in the opposite end of theother strip thus connecting the two firmly together when extended aconsiderable distance across the building. The po- 25 rous or penetrahlematerial maybe of such construction as desired so long as it is of anature that will. readily receive a tack or nail and thus maintain acarpet or other part in position, the metal casing a being`suliicient's@ to prevent the material from .absorbing the moisture fromthe surrounding plastic material to an extent that would interfere withits office. In practice I have used a composition of sawdust: with asuitable adhesive ce- S5 ment for holdingthe Whole together in suitableform, paper pulp, strawboard or equiv alent material for the purpose maybe ernployed.-

As shown Vin Fig. 2, the strips A, B are elnbedded'their depth in theconcrete iloor C, which is reinforced in the usual manner by rods (la7.. It will be seen that by this construction the strips become a partof the completed construction, plttcedin position at the time ofbuilding, and thus become a part of the compression elements in thecomputation of resistance. It is obvious that this decreases Weight,reduces the cost of constructing -the floor, and at the saine 1GOtimeforms a better, iiriner and more coinpact lioor than would be the.case if the floor is lirst completed and then a separate layer ofcement, concrete or other material is laid .upon the top thereof inwhich the usual M5 nailing strip may be embedded.

In the form shown in Fig.y 3, the strip is formed without the additionof a metal shell or inclosing member, and is preferably inthe form ofthelfrusturnoa conebor 11s .other equivalent form that as before men-'tioned will he Aself anchoring in the concrete or plastic material asthe latter sets and hardens. In the form here shown I have secured verysatisfactory results in formingY the strips by means of layers ofstraivboard cemented together under heavy pressure and coated with asuitable Water-proof cement. The cement I have employed is that wellknown to the trade as lt, I, W, a material manufactured by Dr. Toch andWhich. I have found sufficient to resist the absorption of moisture fromthe surrounding cement or plastic material. I have also lsecuredvery'satisfactory results with a strip composed of paper-pulp firmlycompressed and coated with a suitable Water-proof material as above setforth. I have also in my eX` periments employed a similar compound asthat heretofore described where a metal shell is employed. The materialT employed in this case consisted of saw-dust, niagnesia, and anadhesive cement all firmly compressed `under a suitable pressure andcoated with a Water-proof material as above stated. I found all of thesematerials to be substantially non-absorbent to the extent necessary inthe construction referred to and that they will all hold a nail, tack,screW or other holding device to a sufficient extent for the purposesintended.

As shown in Fig. t a number of the strips shown in Fig. 3 are in placein a tloor as is illustrated in Fig. 2, the strips forming a part of thecompression member in computation of resistance. Here again the trussrods ci al are shown theiioor and strips being formed as a completeWhole and Without the additirn of an additional layer of plasticmaterial to hold the nailing strips in place.

As shown in Fig. 1 and Fig. 2 c e are nails or. tacks suitable to hold acarpet in place, and as shown in Fig. 3 g g areJ suitable nails forholding` a floor board in position upon the strips.

It lis obvious that after having thus described my improvement variousimmaterial modifications may be made either in the composition lof thestrips themselves or in their form, Without in any Way departing fromthe spirit of my inventionl which broadly consists in the use of suchstrips which are sufficiently non-absorbent to prevent the swelling andshrinking of the strips during the settingof the inclosing,T plasticmaterial, and which at the same time Will be of a composition that Willreceive and suitably hold a nail or equivalent member to secure parts tothe strips. It is also preferably substantially fire-proof as before setforth, and as before stated is preferably self anchoring.

Having thus described my invention what I claim as new, and desire tosecure by Letters Patent is.

The combination with a body of plastic composition, of a moistureabsorbent penetrable nailing strip embedded in said body, the said stripbeing protected by a surrounding moisture proof casing.- f

In testimony whereof, I have hereunto signed my name in the presence oftwo subscribing Witnesses. V

SMITH MARTIN RANDOLPH.

Witnesses BURTON U. I-IILLs,4 CHARLES I. COBB.

